LG ProBake Convection Heating Element Issue: Hole or Hot... | appliancefaults.com

Technical Background:

The LG ProBake Convection oven uses a bake element controlled by the Main Control Unit (MCU) to generate heat. The MCU sends a 240V AC signal to the element via a relay based on the temperature setting. A temperature sensor (RTD) provides feedback to the MCU, which adjusts the power to maintain the set temperature. Resistance in the heating element should be within a specific range; a break or short will disrupt this and cause faults.

Symptoms:

The homeowner reports a visible hole or hot spot on the LG ProBake Convection oven's bake element. The oven may be heating unevenly, taking longer to preheat, or not reaching the set temperature.

Possible Causes:

Normal wear and tear due to repeated heating and cooling cycles.
Voltage fluctuations or power surges.
Food spills or debris buildup on the element.
Manufacturing defect in the heating element material.
Excessive temperatures or prolonged use at high temperatures.

Solution:

1

Disconnect power to the range at the breaker panel. Verify 0V AC at the range receptacle.
2

Remove the oven racks and any oven liners.
3

Locate the bake element, typically at the bottom of the oven cavity.
4

Carefully remove the screws securing the bake element to the oven. Use a 1/4-inch nut driver or appropriate screwdriver.
5

Gently pull the bake element out far enough to access the wiring connections at the rear. Take a photo of the wiring before disconnecting.
6

Disconnect the wires from the bake element terminals using pliers if necessary. Inspect the wiring for any signs of damage.
7

Using a multimeter set to ohms, test the old element for continuity. An open circuit confirms failure. If unsure, compare the resistance reading to a new element.
8

Connect the wires to the new bake element, matching the original wiring configuration. Ensure connections are secure.
9

Carefully slide the new bake element back into position and secure it with the screws.
10

Replace the oven racks. Restore power at the breaker panel.
11

Test the oven by setting it to bake at 350°F. Verify the new element heats evenly and the oven reaches the set temperature.

Safety Warning:

Disconnect power to the appliance at the breaker panel before performing any repairs. Lock Out / Tag Out (LOTO) procedures must be followed to prevent accidental re-energization. This appliance operates at 240V AC, which can cause serious injury or death. If you are not comfortable working with electricity, consult a qualified appliance repair technician.

Prevention:

Regularly clean the oven interior to prevent food spills and debris from accumulating on the bake element. Avoid using abrasive cleaners that could damage the element. Periodically inspect the element for signs of wear or damage.

Expert Tip:

Many LG ovens have a service mode that allows you to test individual components, including the bake element. Consult the service manual or search online for the specific service mode entry procedure for your model. This can help pinpoint the issue and confirm the element failure.

Frequently Asked Questions

•What is the typical lifespan of a bake element in an LG ProBake Convection oven?

The lifespan can vary depending on usage and maintenance, but typically a bake element should last between 5-10 years. Frequent use at high temperatures or failure to clean spills can shorten its lifespan.

•Could a faulty oven temperature sensor cause the bake element to overheat and fail?

Yes, a faulty oven temperature sensor (RTD) could provide inaccurate temperature readings to the MCU. This could cause the MCU to continuously power the bake element, leading to overheating and premature failure.

•What is the correct resistance reading for a new bake element in this model oven?

The resistance reading for a new bake element typically ranges from 19 to 24 ohms. Consult the oven's service manual or technical data sheet for the specific resistance range for your model. Always disconnect power before testing resistance.

LG ProBake Convection Heating Element Issue: Hole or Hot Spot Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the typical lifespan of a bake element in an LG ProBake Convection oven?

•Could a faulty oven temperature sensor cause the bake element to overheat and fail?

•What is the correct resistance reading for a new bake element in this model oven?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: